China and the United States are back at the negotiating table. Days later, in Beijing, officials restarted long-stalled talks on curbing the flow of fentanyl to the United States. And the White House says Mr. Biden plans to speak by phone with China’s leader, Xi Jinping, in the spring. The developments point to a tentative détente struck by Mr. Biden and Mr. Xi at a summit near San Francisco in November — and both the potential and the limitations of that thaw in relations. In the meetings, they have pushed a new catchphrase, the “San Francisco Vision,” claiming that Mr. Xi and Mr. Biden agreed at the summit to stabilize relations and put competition aside.

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Persons: Mr, Biden, Xi Jinping, Xi Organizations: San Francisco Vision Locations: China, United States, Bangkok, China’s, Korea, Iran, Beijing, San Francisco, —